Truck has been periodically stalling and 'bucking' (if it weren't a diesel, I'd be chasing ignition problems!). This has been going on long enough that I've changed the oil twice. Oil filter, fuel filter, air filter all in good shape.

It's been to the dealer 3 times to no avail.They did replace the CPS, didn't fix the problem. It get engine code P0263 "Turbo boost sensor A circuit perfomance." This is a stock engine. Is it possible that the engine controller thinks the turbo is over pressured and is 'defueling' the engine - completely?

I'm at a loss, what do I do next? MAP sensor? Wastegate? What could cause this?

Thanks!

GravityMike

 

My 6.0 has been doing that to the point of stalling, but I've been running non-winterized fuel in the rear tank and it's probably colder here. I switch to the front tank and it straightens right out. Don't know about the codes.

 

See if you guys can help on this , I got a 94 f350 7.3idi with a turbo the guy I bought it from let it sit for the winter and the waste gate is stuck shut , I'm gonna pull it apart and break it free but my actuator diaphragm is broke so it won't open and close properly, would it be better for now to run it wide open so my turbo doesn't over boost